1Research progress in periodontal Ehlers-Danlos syndromesWU Juan, SUN Wei-bin, LI Hou-xuanSYMPOSIUM266-2702Measurement and analysis of mandibular volume in patients with unilateral complete cleft lip and palate during mixed dentitionTIAN Zhong-hui, FAN Cun-hui, LIU Yi, WANG Hong-yang, FANG Xiao-xu, XU Xiao-lin, ZHANG QiORIGINAL CONTRIBUTIONS275-2783Effects of Porphyromonas gingivalis infection on inflammatory response of human aortic endothelial cellsPAN Sheng-bo, YAN Fu-huaORIGINAL CONTRIBUTIONS285-2904Effect of different irrigation protocols on bond strength of root canal seelers to the wall after root canal fillingBI Xin-xin, CHEN Qing, YU Jing-taoORIGINAL CONTRIBUTIONS291-2955Research progress in the relationship between periodontitis and tumorsLI Yu-chao, PAN Ya-pingREVIEW307-3116Research progress in stem cells of dental origin and dental pulp regenerationWANG Heng-xin, WANG Si-tuo, WU Mei-ling, LI BeiREVIEW312-316